1 files changed, 58 insertions, 0 deletions
diff --git a/chromium/content/child/fling_curve_configuration.h b/chromium/content/child/fling_curve_configuration.h
new file mode 100644
index 00000000000..1a6573dccee
--- /dev/null
+++ b/chromium/content/child/fling_curve_configuration.h
@@ -0,0 +1,58 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_
+#define CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_
+
+#include <vector>
+
+#include "base/synchronization/lock.h"
+#include "third_party/WebKit/public/platform/WebFloatPoint.h"
+#include "third_party/WebKit/public/platform/WebSize.h"
+
+namespace blink {
+class WebGestureCurve;
+}
+
+namespace content {
+
+// A class to manage dynamically adjustable parameters controlling the
+// shape of the fling deacceleration function.
+class FlingCurveConfiguration {
+ public:
+  FlingCurveConfiguration();
+  virtual ~FlingCurveConfiguration();
+
+  // Create a touchpad fling curve using the current parameters.
+  blink::WebGestureCurve* CreateForTouchPad(
+      const blink::WebFloatPoint& velocity,
+      const blink::WebSize& cumulativeScroll);
+
+  // Create a touchscreen fling curve using the current parameters.
+  blink::WebGestureCurve* CreateForTouchScreen(
+      const blink::WebFloatPoint& velocity,
+      const blink::WebSize& cumulativeScroll);
+
+  // Set the curve parameters.
+  void SetCurveParameters(
+      const std::vector<float>& new_touchpad,
+      const std::vector<float>& new_touchscreen);
+
+ private:
+  blink::WebGestureCurve* CreateCore(
+    const std::vector<float>& coefs,
+    const blink::WebFloatPoint& velocity,
+    const blink::WebSize& cumulativeScroll);
+
+  // Protect access to touchpad_coefs_ and touchscreen_coefs_.
+  base::Lock lock_;
+  std::vector<float> touchpad_coefs_;
+  std::vector<float> touchscreen_coefs_;
+
+  DISALLOW_COPY_AND_ASSIGN(FlingCurveConfiguration);
+};
+
+} // namespace content
+
+#endif // CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_